Study On Compound Sodium Persulfate Oxidation System To Remove Volatile Petroleum Hydrocarbons In Underground Water

The refinery site has leakage phenomenon,to prevent contamination of shallow groundwater,this paper uses siderite catalyzed hydrogen peroxide and sodium persulfate oxidation system.But there is little research on the dual oxidant system,and hydrogen peroxide and sodium persulfate in different dosage ratio on different pollutants removal efficiency has not been done detailed research.Therefore,the mixed solution of MTBE,Btex and Naphthalene as the research object.Simulation of groundwater conditions in 40mL sample bottle,which is to comparison of hydrogen peroxide and sodium persulfate in different dosage ratio of removal efficiency,determine the most suitable dosage ratio,and discuss the effect of siderite dosage,water pH and concentration of HCO₃^-.The main experimental results are as follows:the dosage of sodium persulfate and siderite is proportional to petroleum hydrocarbon pollutant removal rate,in the experiment,nine kinds of material removal rate can be reached 100%;to enhance the system performance of siderite oxidation,removal of benzene and naphthalene is better than that of MTBE;the pH value of water has great influence on the removal of MTBE,btex and naphthalene removal rate slowed down but still apply;btex and naphthalene can be applied to the HCO₃^-containing system,MTBE is not suitable for this system.The experimental results provide a scientific basis for the development of the actual chemical oxidation repair project.